Evaluate
\frac{7\left(x+3\right)}{x-3}
Expand
\frac{7\left(x+3\right)}{x-3}
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\frac{\left(x^{2}-9\right)\left(7x+7\right)}{\left(x+1\right)\left(x^{2}-6x+9\right)}
Divide \frac{x^{2}-9}{x+1} by \frac{x^{2}-6x+9}{7x+7} by multiplying \frac{x^{2}-9}{x+1} by the reciprocal of \frac{x^{2}-6x+9}{7x+7}.
\frac{7\left(x-3\right)\left(x+1\right)\left(x+3\right)}{\left(x+1\right)\left(x-3\right)^{2}}
Factor the expressions that are not already factored.
\frac{7\left(x+3\right)}{x-3}
Cancel out \left(x-3\right)\left(x+1\right) in both numerator and denominator.
\frac{7x+21}{x-3}
Expand the expression.
\frac{\left(x^{2}-9\right)\left(7x+7\right)}{\left(x+1\right)\left(x^{2}-6x+9\right)}
Divide \frac{x^{2}-9}{x+1} by \frac{x^{2}-6x+9}{7x+7} by multiplying \frac{x^{2}-9}{x+1} by the reciprocal of \frac{x^{2}-6x+9}{7x+7}.
\frac{7\left(x-3\right)\left(x+1\right)\left(x+3\right)}{\left(x+1\right)\left(x-3\right)^{2}}
Factor the expressions that are not already factored.
\frac{7\left(x+3\right)}{x-3}
Cancel out \left(x-3\right)\left(x+1\right) in both numerator and denominator.
\frac{7x+21}{x-3}
Expand the expression.
Examples
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y = 3x + 4
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Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}